mineral

Tumbled blue chalcedony or pale aquamarine-like quartz

Chalcedony (microcrystalline SiO₂), possibly blue quartz; visual identification is uncertain

AI-generated identification · may be incorrect

Translucent blue-gray to colorless, vitreous/waxy luster, no visible cleavage, conchoidal fracture, and likely Mohs hardness about 6.5–7; rounded edges indicate tumbling or polishing.

Identified August 9, 2026More mineral →

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At a glance

Common name: Tumbled blue chalcedony or pale aquamarine-like quartz
Scientific name: Chalcedony (microcrystalline SiO₂), possibly blue quartz; visual identification is uncertain
Category: mineral
Identified: August 9, 2026
Method: Standard

AI Estimated Value

Typically $3–$20 for a small tumbled piece; approximately $20–$100+ if confirmed natural, attractive blue chalcedony or a quality cabochon.

Not an official valuation

AI estimate for general interest only — not an appraisal. Actual value depends on condition, provenance, and market demand. Verify with a professional before buying, selling, or insuring.

This identification was generated by AI and may contain errors. Verify important details before relying on them — and never use an AI result to judge whether a specimen is safe to handle. Read the full disclaimer

Physical properties

Translucent blue-gray to colorless, vitreous/waxy luster, no visible cleavage, conchoidal fracture, and likely Mohs hardness about 6.5–7; rounded edges indicate tumbling or polishing.

Formation & geological history

Quartz-rich silica formed from hydrothermal or groundwater fluids in cavities and fractures; chalcedony commonly formed during the Cenozoic, though its exact age cannot be determined visually.

Uses & applications

Used as a decorative tumbled stone, cabochon, carving material, and collector specimen; quality blue chalcedony may be used in jewelry.

Geological facts

The cloudy internal wisps and smooth polish are consistent with chalcedony, but the image alone cannot exclude glass or another quartz variety. Natural chalcedony commonly shows subtle fibrous translucency rather than distinct large crystals.

Field identification & locations

Test with a steel file or quartz point: genuine quartz should resist scratching; glass may show bubbles and scratches more readily. Common sources include Brazil, India, Madagascar, Turkey, and the United States.